ionic UI(三)TypeScript - handbook

ionic UI(3)TypeScript - handbook
ionic UI(3)TypeScript - handbook

1 Basic Types
boolean  - var isDone :boolean = false;
number - var height: number = 6;
string - var name:string = ‘carl’;
            name = “sillycat”;
Array - var list:number[] = [1,2,3];
            var list:Array<number> = [1,2,3];
Enum - enum Color { Red, Green, Blue };
             var c: Color = Color.Green;
usually, enum begin from 0, we can set the number as well.
enum Color {Red = 1, Green = 2, Blue = 4};
var colorName: string = Color[2];
alert(colorName);

The alert message is ‘Green'
Any - var notSure: any = 4;
         notSure = “may be a string instead”;
         notSure = false;
Void - function warnUser(): void {
               alert(“warning message.");
           }

2 Interfaces
interface LabelledValue {
     label: string;
}

This interface requires there is a property label in the parameter object.

Optional Properties in Interface
interface SquareConfig {
     color?: string;
     width?: number;
}

Class Types
interface ClockInterface {
     currentTime:Date;
     setTime(d:Date);
}

class Clock implements ClockInterface {
     currentTime: Date;
     setTime(d:Date) {
          this.currentTime = d;
     }
     constructor(h:number, m: number) { }
}

Extending Interfaces
interface Shape {
     color: string;
}

interface Square extends Shape {
     sideLength: number;
}
var square = <Square>{};
square.color = “blue”;
square.sideLength = 10;

3 Classes
Inheritance of Class
class Animal {
     name: string;
     contractor(theName:string) { this.name = theName; }
     move(meters: number = 0) {
          alert(this.name + “ can move “ + meters + “m.")
     }
}

class Snake extends Animal {
     constructor(name:string) { super(name); }
     move(meters = 5) {
          alert(“slithering….");
          super.move(meters);
     }
}

Private/Public modifiers - public is always the default

Getter / Setter
var passcode = “secret passcode”;

class Employee {
     private _fullName: string;

     get fullName(): string {
          return this._fullName;
     }

     set fullName(newName: string) {
          if(passcode && passcode == “secret passcode”){
               this._fullName = newName;
          }else{
               alert(“Unauthorized update of employee!");
          }
     }
}

var employee = new Employee();
employee.fullName = “Carl Luo”;
if(employee.fullName) {
     alert(employee.fullName);
}

4 Modules
>tsc —out sample.js Validation.ts LettersOnlyValidator.ts ZipCodeValidator.ts Test.ts

5 Functions
default and optional parameters
function buildName(firstName:string, lastName?:string){
}

function buildName(firstName:string, lastName = “Smith”) {
}

6 Generics

More documents in the handbook, but I think I am ok that I only read the first few chapters.
http://www.typescriptlang.org/Handbook

References:
http://www.typescriptlang.org/Handbook